Tripartite mass transfer model: development, implementation in DYVRO, verification and validation
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T. Neuhaus
Abstract
For the realistic simulation of condensation induced water hammer (CIWH) in horizontal pipes resulting from the contact of steam at sub-cooled water, an appropriate model for the mass and energy transfer due to phase change is needed. For this purpose the tripartite mass transfer (TMT) model has been developed that is introduced in the present paper. The TMT model is based on the assumption of isentropic processes and accounts for vaporization due to flashing, condensation due to isentropic decompression (homogenous condensation) and direct contact condensation at the phase interface. The TMT model shall be considered as a frame for sub-models which may be arranged for the three above-mentioned phase change phenomena. The TMT model has been implemented in the one-dimensional two-phase pressure surge code DYVRO mod 3. A verification and validation procedure was performed based on experiments at test facilities in Oberhausen (PPP), Rossendorf (CWHTF) and Budapest (PMK-2).
Kurzfassung
Zur realitätsnahen Simulation von Kondensationsschlägen in horizontalen Rohren infolge des Kontaktes von Dampf an unterkühltem Wasser ist es u.a. notwendig, die Massen- und Energietransferphänomene zwischen den Phasen hinreichend genau zu modellieren. Zu diesem Zweck wurde das TMT-Modell entwickelt, das in dem vorliegenden Beitrag vorgestellt wird. Es stellt ein übergeordnetes Rahmenmodell dar, das in Abhängigkeit der auftretenden Phasentransfer-Phänomene unterschiedliche spezialisierte Untermodelle aufruft, wobei immer von einer isentropen Zustandsänderung ausgegangen wird. Es unterscheidet zwischen Direktkondensation, homogener Kondensation und der Entspannungsverdampfung. Das TMT-Modell wurde in den eindimensionalen Zweiphasen-Code DYVRO mod. 3 implementiert und Verifizierungs- und Validierungsrechnungen gegen Experimente an Versuchsanlagen in Oberhausen (PPP), Rossendorf (CWHTF) und Budapest (PMK-2) vorgenommen.
References
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© 2012, Carl Hanser Verlag, München
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Editorial
- Pressure Surges in Nuclear Power Plants – selected contributions for the homonymous mini-symposium of the NURETH-14 in Toronto
- Technical Contributions/Fachbeiträge
- Maintaining competence in nuclear safety and waste management research by BMBF
- Computational models to dertermine fluiddynamical transients due to condensation induced water hammer (CIWH)
- Condensation-induced water hammer in a horizontal pipe
- Slug modeling with 1D two-fluid model
- Delayed equilibrium model and validation experiments for two-phase choked flows relevant to LOCA
- Tripartite mass transfer model: development, implementation in DYVRO, verification and validation
- Condensation induced water hammer – overview and own experiments
- A discussion of hyperbolicity in CATHENA 4: Virtual Mass and phase-to-interface pressure differences
- Pressure surge in Wendelstein 7-X experimental stellarator facility
- Condensation induced water hammer and steam assisted gravity drainage in the Athabasca oil sands
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Editorial
- Pressure Surges in Nuclear Power Plants – selected contributions for the homonymous mini-symposium of the NURETH-14 in Toronto
- Technical Contributions/Fachbeiträge
- Maintaining competence in nuclear safety and waste management research by BMBF
- Computational models to dertermine fluiddynamical transients due to condensation induced water hammer (CIWH)
- Condensation-induced water hammer in a horizontal pipe
- Slug modeling with 1D two-fluid model
- Delayed equilibrium model and validation experiments for two-phase choked flows relevant to LOCA
- Tripartite mass transfer model: development, implementation in DYVRO, verification and validation
- Condensation induced water hammer – overview and own experiments
- A discussion of hyperbolicity in CATHENA 4: Virtual Mass and phase-to-interface pressure differences
- Pressure surge in Wendelstein 7-X experimental stellarator facility
- Condensation induced water hammer and steam assisted gravity drainage in the Athabasca oil sands
